Gas-oven.



. No. 805,423. PATENTED NOV. 21. 1905.

W. J. KEEP & H. G. MAUI.

GAS OVEN.

APPLIOATIOH FILED DBO.26,1903.

2 SHEETS-SHEET 1.

WITNESSES ZWVEWTO R5 aDQ/WA/WSM/"TJ mtorneys.

No. 805,423. PATENTBD NOV. 21, 1905. W. J. KEEP & H. G. MAUI...

GAS OVEN.

uruoynon FILED DEO.26,1903.

2 SHEETS-SHEET 2.

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I. VEW T 035 I 5 Wm M fltiomeys.

WITNESSES 6 A0. @(JJM ed by gas-flames.

.UNITEI) STATES PATENT OFFICE.

WILLIAM J. KEEP AND HENRY C. MAUL, OF DETROIT, MICHIGAN, ASSIGN CRS TO THE MICHIGAN STOVE CORPORATION OF MICHIGAN.

COMPANY, OF DETROIT, MICHIGAN, A

GAS-OVEN.

Specification of Letters Patent.

Patented Nov. 21, 1905.

cation.

This invention relates to ovens to be heatgasflame is inclosed within the oven itself and the object of our invention is to provide an improved oven in which the gas may be ignited from the outside of the oven and at the side thereof and in which danger from explosion of a gas-and-air mixture within the oven is avoided We are aware that Letters Patent have been heretofore issued to various persons for alleged improvements in these particulars; but in these patents devices are shown in which it is necessary to put the igniting-flame within the oven from .a position in front of the open door. There is danger in such devices of causing an explosion which may injure the person igniting the gas.

This invention consists in the improvements hereinafter described, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a perspective view of an oven embodying our invention. Fig. 2 is a plan view showing the foraniinous tubes or manifolds which convey gas to be burned as it issues injets through the holes in said tubes, together with the device for igniting the jets from the outside of the tube. Fig. 3 is a detail section on the line 3 3 of Fig. 2. Fig. 4 is an elevavation of the parts shown in plan in Fig. 2. Fig. 5 is a perspective view of the apparatus for igniting the jets from the outside of the oven. Fig. 6 is a sectional perspective view of the part of the apparatus of Fig. 5 contiguous to a wall of the oven and a portion of the walls adjacent thereto.

A A are the walls of the oven.

B is the door of the oven pro er, which door in this case is shown as of t e drop kind.

C is a door leading to a chamber below the In this kind of oven the.

toward the tube E"from said holes.

tacting an end of said lever.

, oven proper, at the upper part of which chamber are the tubes or manifolds D D.

D is a cock controlling the admission of gas to the tube or manifold D, and D is a cock controlling the admission of gas to the tube or manifold D.

E is the device for igniting the ets from the outside of the oven. This consists of two castings united together by a bolt 6 to form a T-shaped conduit or trunk, two ends of which partially surround the tubes or manifolds D D. The portion between the tubes D D is arched upward to a point intermediate between said tubes, and from the middle portion extending upward and outward there is a part E, forming a tube leading to an aperture a through the Walls of the oven. The upper casting of the device shown in Fig. 5 has formed in it the notches E at the edge which comes against the lower casting at the inner side thereof, or holes may be drilled in other parts of the trunk, so that said notches form openings leading into the channel or chamber in said device which extends between the tubes D D.

Holes through the walls of the tube D D (shown most distinctly in Fig. 3 and marked (1) open into the chamber of the device E, which extends between the tubes D D, so that a gas-jet is projected into said chansibe' a1 chamber communicates with the air in the oven, and the jet of gas entrains and draws in air, so as to form a combustible mixture.

It will be observedithat the hole a communicating with the tube E, is at the side of the oven.

F is a lever pivoted at f to the side of the oven and adapted to be oscillated when the door B is closed by lug f on said door con The lever F is flattened at the end remote from the door B and is adapted when oscillated by the closing of said door to cover the aperture (4 so that the flame, as of a match, cannot reach said aperture when the door B is closed.

The operation of the above-described device is as follows: The cock D or D or both of said cocks, are opened, admitting a jet of gas from the pipes G into the pipes ormanifolds D D. These j ets carrywith them a small portion of air, but not sufiicient to make a combustible mixture at all times. The gas forced into the manifolds D D flows out of the holes 01 into the chamber between said manifolds in the device E, and the gas rises up in the conduit E to the aperture (1. in the oven-wall and may by lighted by a match at said aperture from the outside of the oven. Air flows in through the notches E to mingle with the gas, making a combustible mixture. The flame is carried down the tube E through the channel or chamber between the manifolds D D, and the jets of said manifolds are ignited by said flame. It will be observed that the tube E has its upper end contiguous to the inner Wall of the oven, its channel oommunicating with the oven through an aperture. Thus the hot air passing through the tube E is carried into the oven and not to the outside of the oven. This construction isillustrated in Fig. 6, in which it will be noticed that the tube E communicates by an upwardly-extending passage-way with the interior of the oven, the passage-way being formed by the upwardly-extending lip on said tube and the wall of the oven.

If one burner is lighted, it will ignite the gas flowing into the trunk E, and the flame will be carried from the lighted burner to ignite the opposite burner.

What we claim is 1. In a gas-stove, in combination with an oven and the door thereto, a burner, a chamber surrounding the burner, an aperture through the wans of said chamber, a flameconductor extending from the burner to said aperture, a cover to said aperture actuated by gravity to open a passage through said aperture and a projection on the door adapted to engage the cover and cause the same to engage over the aperture, substantially as described.

2. In a gas-stove, in combination with an I oven, a door therefor, a combustion-chamber provided with an opening in its walls, a burner therewithin, a flame-conductor leading therefrom to said opening, a cover for said opening adapted to open a passage through said open ing when it is displaced from its normal position, and an engaging piece carried by said door for displacing the cover, substantially as described.

In a gas-stove, the combination of an even provided with a door, a combustionchamber provided with an aperture through its wall, a burner therewithin, a channel leading therefrom through said aperture, a cover for said aperture, arranged to be displaced from closing position thereover, and engaging means carried by the door to effect such displacement, substantially as described. l. In combination with an oven and a combustion-chamber provided with walls and an opening through said walls, two burners within said chamber having apertures for the escape of gas, a trunk extending between said burners and adapted to receive the gas escaping from an aperture in each of said burners, a branch of said trunk leading to said opening, a cover to said opening oscillated by gravity to uncover said opening contemporaneously with the opening of said door and by said door to close said opening, substantially as described.

In testimony whereof we sign this specification in the presence of two witnesses.

WILLIAM J. KEEP. HENRY C. MAUL.

Witnesses RALZEMOND PARKER, ELLIOTT J. STODDARD. 

